How do skiers obtain the energy to climb the mountain slope? A. They convert sunlight into energy.
B. They obtain energy from the food they ate.
C. They obtain energy from the nucleus inside the atoms within their bodies
D. They collect different forms of energy from the environment.

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

What organelle other than the nucleus houses dna in a eukaryotic cell?

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food